Dr. Conrad Murray gave Jackson infusions of Propofol, an anesthetic used during surgery, to treat the superstar's insomnia for 60 straight days before the 50-year-old died of an overdose of the drug on June 25, 2009.

Sleep expert Dr. Charles Czeisler, a Harvard Medical School sleep expert testifying at the wrongful death trial of concert promoter AEG Live, explained that Propofol offers no REM sleep, despite leaving the patient feeling refreshed as if they had experienced genuine sleep.

Czeisler — a sleep consultant to NASA, the CIA, and the Rolling Stones — said no one had ever undergone such a treatment.

He added that the lack of REM sleep may have soon killed The King of Pop anyway, noting that lab rats die after five weeks of getting no REM sleep.

"It would be like eating some sort of cellulose pellets instead of dinner," Czeisler said. "Your stomach would be full and you would not be hungry, but it would be zero calories and not fulfill any of your nutrition needs."